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Does a router direct packets to MAC addresses?
MAC vs IP Address Relationship MAC operates at Layer 2 of the OSI model while IP operates at Layer 3. MAC addresses are typically used only to direct packets from one device to the next device as data travels on a network. If you have a router, then your machine’s MAC address will go no further than that.
Does IP packet contain MAC address?
Actually, the MAC address of the sender node is not part of the IP protocol packets, the IP address is. When an IP packet reaches the last ‘hop’, the concerned router sends an ARP request to all nodes asking for the MAC address corresponding to the recipient IP address in the headers of the packet.
Is router same as MAC address?
MAC addresses are a unique number or identifier built into modems, routers and other network hardware. To fix this, you will need to configure the router to pretend to have the same MAC address as the ISP “approved” computer, instead of its own.
When a Ethernet frame passes through a router what happens to the MAC address?
When a frame comes into a router, the router strips off and discards the frame, losing any layer-2 addressing, including MAC addresses.
Can I change the MAC address of my router?
It’s only possible to change a router’s MAC address if the router has the MAC Clone feature — most routers do. You can easily change the MAC address of a router via the MAC clone feature.
How do routers know where to send the frames they receive?
The router uses the information in the IP header to decide whether and where to forward each received packet, and which network interface to use to send the packet. Most packets are forwarded based on the packet’s IP destination address, along with routing information held within the router in a routing table.
Is there routing based on a MAC address?
I almost forgot to mention: there is no routing based on MAC addresses. Low level ethernet and MAC addresses can only reach every device on the same network (cabled or wireless). If you have two networks with a router in between you cannot have a device in network A send a packet to the MAC address of a device in network B.
Can a device in network B have a MAC address?
If you have two networks with a router in between you cannot have a device in network A send a packet to the MAC address of a device in network B. No device in network A has the MAC address of the device in network B, so a packet to this MAC address will be discarded by all devices in the network A (also by the router).
What is a MAC address used for in a packet?
There is a special protocol ARP (address resolution protocol) that is used for that. Once the sender has retrieved the MAC address of the next hop, he writes that target MAC address into the packet and sends the packet.
How are MAC addresses changed by routers for forwarding?
Host A and B are in different subnets, and their default gateways are Router A and Router B vlan interfaces. My question is when Router A forward the packets to Router B, does it change packets’ source MAC to it outgoing interface MAC and destination MAC to Router B’s incoming interface MAC?